Home / 421,105.43-631,565.30-121,520.93

Finding the Fourth Proportional to 421,105.43, 631,565.30 and 121,520.93

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Solution

The fourth proportional to 421,105.43, 631,565.30 and 121,520.93 is: 182,254.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,105.43 : 631,565.30 = 121,520.93 : x
  2. Step 2: Convert to fraction form
    421,105.43/631,565.30 = 121,520.93/x
  3. Step 3: Cross multiply
    421,105.43x = 631,565.30 × 121,520.93
  4. Step 4: Simplify right side
    421,105.43x = 76,748,399,757.70
  5. Step 5: Solve for x
    x = 76,748,399,757.70/421,105.43
  6. Step 6: Final answer
    x = 182,254.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.